Angularly-adjustable tool-holder.



G. A. SHOULDIGE.

ANGULARLY ADJUSTABLE TOOL HOLDER.

APPLICATION FILED mmzz, 1912.

- ,7 1- Patented Jan. 14,1913,

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GEORGE A. SHOULDICE, 0F ALEXANDRIA, VIRGINIA.

ANGULARLY-ADJUSTABLE TOOL-HOLDER.

Specification of Letters Patent. Application filed January 22, 1912.

Patented Jan. 14:, 1913. Serial No. 672,672.

To all whom it may concern:

Be it known that I, GEORGE A. SHoULDIcE, a citizen of the United States,residing in the city and county of Alexandria and State of Virginia,have invented certain new and useful Improvements inAngularly-Adjustable Tool-Holders, of which the following is aspecification.

The object of my invention is to provide in an angularly adjustable toolholder, a split clamping seat for the tool and a wedging socket for saidseat, so that when the seat is drawn in an axial direction, it will beclamped upon the bit or tool.

A further object of my invention is to provide a circular clampingsocket so that the clamping seat can rotate in it to raise or lower thecutting point of the bit, whereby fine angular adjustment of the bit canbe obtained after it has been roughly positioned.

In the drawing, Figure 1 is a side elevation of an angularly adjustabletool holder embodying my invention; Fig. 2 is a front elevation of thesame; Fig. 3 is an elevation in detail; Fig. 1 is a sectional View onthe line H, Fig. 3, parts being in elevation; Fig. 5 is a detailelevational view of the clamping seat detached; and Fig. 6 is a detailside elevation of the wedging socket.

1 represents a suitable support on which the tool post 2 is secured,said post having a clamping nut or screw 3. The post is provided with anelongated slot in which the tool holding bar 4 is secured by means ofthe screw 3.

The outer end of the tool holding bar is deflected to one side asclearly shown in Fig. 1 and is provided with an enlarged annular hollowhead 5 having a wedging socket 6, the walls of which socket are taperedas clearly shown in Fig. 4. This socket is provided with a centralopening around which is a collar 7, which forms a seat for the clampingnut 8, the inner face of the collar and the opening in the socket beingscrewthreaded, as clearly shown in Fig. 4. The split clamping seat iswedge-shape in crosssection, as more clearly shown in Figs. 4 and 5,where it will be seen that the outer walls 10 of the seat 9 areinclined.

11 is a screw extending axially from the clamping seat and adapted toproject through the screw-threaded opening and collar of the wedgingsocket on which the nut 8 is adapted to be screwed. The split clampingseat is provided with a split 12 which extends a short distance in thebody of the screw 11, whereby the clamping seat may be firmly clamped onthe tool 13. The tool 13 is adapted to be received in the wedge-shapedseat 141- of the clamping seat. It will be noticed that the walls of thewedge-shaped seat 14 converge toward the outer face of the splitclamping seat and that the cutting tool 13 is provided with an upper andlower face corresponding to the converging walls of the seat 14, wherebythe 001 is firmly wedged in position against lateral displacement whichis very essential in the boring or cutting of a piece of metal, as willbe understood by those skilled in the art, inasmuch as a fractionallateral movement of the tool would tend to destroy the work operatedupon. The split clamping seat, after the tool 13 is in position, isdrawn snugly within the wedging socket 5 by means of the nut 8,whereupon the walls of the wedging socket compress the clamping seatfirmly on the tool, the split 12 permitting the walls of the clampingseat to be drawn together, as will be readily understood.

5 is a lug on the wedging socket in which is mounted a set screw 16, theinner end of which is adapted to impinge against the under face of thecutting tool. The object of this construction is to give fineadjustments to the cutting tool. It frequently happens that after thecutting tool is set for its work, that some finer adjustment of the toolis necessary for accurate cutting. I provide for this fine adjustment bymeans of the set-screw 16 which, upon being revolved in the lug 15adjusts the tool, as shown in dotted lines in Fig. 3, to any desiredfine adjustment. In this connection, it will be noted that the wedgingsocket and the split clamping seat are circular so that there is nodifliculty in revolving the split clamping seat in the wedging socket bymeans of the screw 16 for the finer adjustments of the cutting tool. Itwill also be noted that the adjusting screw 16 is located beneath thebit or tool 13, when the tool bar I is.in position in the post, so thatthe screw 16 receives the thrust upon the bit, therefore there is noliability of the thrust upon the bit revolving the split clamping seat 9in its wedging socket and thus disturbing the finer adjustment of thebit. The wall of the wedging socket is provided with diametricallyopposite recesses 17 and 18, through which the tool 13 projects, saidsockets being wider than the tool so that the tool may be revolved withthe split clamping seat in said socket, as will be readily understoodfrom the dotted lines in Fig. 3.

I claim 1. In a tool holder, the combination with a wedging socketcircular in cross section and provided with an opening through its rearwall, of a split clamping seat-member adapted to enter said socket,formed with a tool seat having one open side and undercut top and bottomwalls, a screw-threaded shank extending from said split clamping seatand adapted to pass through the opening in the wall of the socket, andhaving a jam-nut, and a tool in the tool seat conforming to the undercutwalls and having a transverse dimension which causes it to extend beyondthe face of the holder.

2; In a tool holder, a wedging socketmember having one open face andtapering side walls, a split clamping seat-member fitted in said socketand formed with one open face with opposed undercut side walls and witha flat inner face, a tool having side faces conforming to the undercutside walls of the clamping seat-member and having a transverse dimensionwhich extends it beyond the outer faces of the socketmember andseat-member.

3. In a tool holder, the combination with a wedging socket circular incross section having an opening in its rear wall, diametrically oppositerecesses in the wall of said socket, a lug projecting tangentially fromthe wall of said socket below one of said recesses, and an adjustingscrew mounted in said lug, of a split clamping seat adapted to entersaid wcdging socket and provided with a tool seat having undercut topand bottom walls, a screw-threaded shank extending from said clampingseat through the opening in the wall of the wedging socket, a nutmounted on said shank whereby the clamping seat may be drawn in an axialdirection into said socket to clamp a tool in said tool seat, and a toolhaving an inclined upper and lower face for engagement with saidundercut walls of the tool seat, whereby it is held against lateraldisplacement; said adjusting screw being tangential to the socket so asto develop fine angular adjustment of the tool after it has been roughlypositioned and at 1tohe same time receive the thrust upon the Theforegoing specification signed at \Vashington, D. (I, this 17 day ofNovember, 1911.

GEORGE A. SHOULDICE.

In presence of two witnesses: HERVEY S. KNIGHT, EDWIN S. GLARKsoN.

Copies of thispatent may be obtained. for

five cents each, by addressing the Commissioner of Patents, Washington,D. C.

